package com.jingdianjichi.auth.common.entity;


import lombok.Data;

import java.io.Serializable;
import java.util.Collections;
import java.util.List;

/**
 * 分页结果实体
 */
@Data
public class PageResult<T> implements Serializable {
    private Integer pageNum = 1;
    private Integer pageSize = 20;
    private Integer total = 0;
    private Integer totalPages = 0;
    private List<T> result = Collections.emptyList();
    private Integer start = 1;
    private Integer end = 0;

    public void setRecords(List<T> result) {
        this.result = result;
        if (result != null && result.size() > 0) {
            setTotal(result.size());
        }
    }

    public void setTotal(Integer size) {
        this.total = total;
        if (this.pageSize > 0) {
            this.totalPages = (total / this.pageSize) + (total % this.pageSize > 0 ? 1 : 0);
        } else {
            this.totalPages = 0;
        }
        this.start = (this.pageSize > 0 ? (this.pageNum - 1) * this.pageSize : 0) + 1;
        this.end = (this.start - 1 + this.pageSize * (this.pageNum > 0 ? 1 : 0));
    }


    public void setPageSize(Integer pageSize) {
        this.pageSize = pageSize;
    }

    public void setPageNum(Integer pageNum) {
        this.pageNum = pageNum;
    }
}
